| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Autosomal Dominant Polycystic Kidney Disease  ADPKD |  | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 6.1 |  
| E.1.2 | Level | SOC |  
| E.1.2 | Classification code | 10038359 |  | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To compare in somatostatin and placebo ADPKD groups the change over baseline of the total kidney volume at 1 and 3 years follow-up  estimated by gadolinium contrast enhanced and T2-weighted magnetic resonance imaging, MRI . |  | 
| E.2.2 | Secondary objectives of the trial | 
| Renal cyst volume; Total renal parenchymal volume; Residual renal volume;Renal parenchymal volume taken up by small cysts   5 mm3 ;Systolic and diastolic blood pressure;GFR  plasma iohexol clearance ;GFR  over baseline ;RPF  plasma PAH clearance ;Serum creatinine concentration; Diuresis; 24 h urinary protein excretion rate; 24 h urinary albumin excretion rate; Protein, albumin, creatinine concentrations on spot morning urine samples; Protein /creatinine ratio on spot morning urine samples; Albumin/creatinine ratio on spot morning urine samples; Urinary sodium, urea, glucose, phosphorus concentrations;Urine osmolality.  ALT, AST, GGT; Alkaline phosphatase, total and direct bilirubin;  Serum total proteins;Serum albumin;   Serum urea;Serum uric acid;  Creatin phosphokinase  CPK ;  Serum electrolytes  sodium, potassium, calcium, phosphorus ;Lipid profile  Cholesterol, LDL-Cholesterol, HDL,Cholesterol, Triglycerides ;Blood glucose;Glycated hemoglobin;Plasma Insulin Growth Factor 1. |  | 
| E.2.3 | Trial contains a sub-study | Information not present in EudraCT | 
| E.3 | Principal inclusion criteria | 
| - Age   18 years    - Clinical and ultrasound diagnosis of ADPKD     - GFR  40 ml/min/1-73 m2  estimated by the 4 variable MDRD equation      - Written informed consent |  | 
| E.4 | Principal exclusion criteria | 
| - Diabetes;    - Overt proteinuria  urinary protein excretion rate  1g/24 hours  or abnormal urinalysis suggestive of concomitant, clinically significant glomerular disease;    - Urinary tract lithiasis, infection or obstruction;    - Cancer;    - Psychiatric disorders and any condition that might prevent full comprehension of the purposes and risks of the study;    - Pregnancy, lactation or child bearing potential and ineffective contraception  estrogen therapy in post menopausal women should not be stopped |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| To compare in somatostatin and placebo ADPKD groups the change over baseline of the total kidney volume at 1 and 3 years follow-up  estimated by gadolinium contrast enhanced and T2-weighted magnetic resonance imaging, MRI . |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | Yes | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | Information not present in EudraCT | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | Information not present in EudraCT | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | Information not present in EudraCT | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | Yes | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | No | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT | 
| E.8.7 | Trial has a data monitoring committee | Information not present in EudraCT | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 4 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 4 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 |